PM46971: TPV SHOWS NEGATIVE VALUES FOR ACTIVECOUNT WHEN ENABLED AT RUNTIM E

8.0.0.2: WebSphere Application Server V8.0 Fix Pack 2
8.0.0.3: WebSphere Application Server V8.0 Fix Pack 3
8.0.0.4: WebSphere Application Server V8.0 Fix Pack 4
8.0.0.5: WebSphere Application Server V8.0 Fix Pack 5
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15

APAR status

• Closed as program error.

Error description

• Performance Monitoring Infrastructure (PMI) counter activeCount
  shows negative values on Tivoli Performance Viewer (TPV).
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V8.0                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: When PMI counter activeCount is         *
  *                      enabled at runtime in some scenerios    *
  *                      the activeCount shows negative Values   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Whenever the activeCount PMI counter is enabled after server
  startup, in some scenerios the active count shows negative
  values. This is due to the fact that active count was not
  getting tracked until it was enabled. The trigger to update
  the active count will be fired by the thread pool. So once the
  server starts up, the thread pool notifies PMI for updates of
  the activeCount. Since activeCounter is not enabled the update
  does not happen. Ater some time when the activeCount is
  enabled, then it starts updating the counter based on the
  triggers recieved by the threadPool. So in some scenerios when
  the thread pool requests to reduce the counter and at the same
  time activeCount is enabled, it gets reduced and moves into
  negative values.
  

Problem conclusion

• The reported problem has been fixed by making sure that the
  activeCount datatype is properly tracked irrespective of
  when it was enabled. This makes sure that the negative values
  are avoided.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.0.0.2.  Please refer to the Recommended Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels

• R800 PSY

     UP